Lookin for advice onma rough tune to work better with the BBK 73mm throttle body. I belive stock was roughly 68mm.
I did a cauple pie calculations to find volume and what not, but when lookin at the parameters of TB angle to volume it's a great big chart and I can't seem to get my math to match what's stock programing.
For example 68mm is 5.56in^2 in the program 80deg is only 3.68in^2 that's only about 66% full TB. Now i know the butterfly is still in the middle takin up some volume, but what would be a good guide line?

Im basically trying to start easy, what would be a good start and how do I go about tweaking thease parameters to accommodate for a bigger TB?